Cheng-Ta Yang

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In typical RSA, it is impossible to create a key pair (e, d) such that both are simultaneously much shorter than φ(N). This is because if d is selected first, then e will be of the same order of magnitude as φ(N), and vice versa. At Asiacrypt'99, Sun et al. designed three variants of RSA using prime factors p and q of unbalanced size. The first RSA variant(More)
We investigated whether a pre-change representation is inhibited or weakened under correct change detection. Two arrays of six objects were rapidly presented for change detection in three experiments. After detection, the perceptual identification of degraded stimuli was tested in Experiments 1 and 2. The weakening of a pre-change representation was not(More)
Change detection requires perceptual comparison and decision processes on different features of multiattribute objects. How relative salience between two feature-changes influences the processes has not been addressed. This study used the systems factorial technology to investigate the processes when detecting changes in a Gabor patch with visual inputs(More)
In 1982, Quisquater and Couvreur proposed an RSA variant, called RSA-CRT, based on the Chinese Remainder Theorem to speed up RSA decryption. In 1990, Wiener suggested another RSA variant, called Rebalanced-RSA, which further speeds up RSA decryption by shifting decryption costs to encryption costs. However, this approach essentially maximizes the encryption(More)
Change in a real world setting usually consists of multiple feature changes, and one feature may change more often than another. This study manipulated the number of changes in orientation and spatial frequency to examine the effect of the relative change probability on the comparison and decision processes in a change detection task. Results showed that(More)
Orienting attention to the to-be-tested representations can enhance representations and protect them from interference. Previous studies have found that this effect on feature and bound representations was comparable despite their difference in stability. This may have occurred because participants were tested in a block design, which is susceptible to(More)
Selective attention has been known to play an important role in decision making. In the present study, we combined a cueing paradigm with a redundant-target detection task to examine how attention affects the decision process when detecting the redundant targets. Cue validity was manipulated in two experiments. The results showed that when the cue was 50 %(More)
This study tests the effect of relative saliency on perceptual comparison and decision processes in the context of change detection in which distinct visual mechanisms process two features (e.g., luminance and orientation). Townsend and Nozawa's (1995) systems factorial technology was used to investigate the process architecture and stopping rule when(More)